Application of a sensor-type fault indicator in distribution networks
To achieve rapid selection,detection,and localization of single-phase earth faults in distribution networks and to facilitate swift fault resolution by emergency repair teams,a sensor-type fault indicator and system is applied.This paper details the principles behind the detection of single-phase ground faults by this sensor and system,proposing and employing a comprehensive method that integrates the sensor with the existing distribution automation terminals′ zero-sequence current for fault location.Practical applications show this sensor′s high sensitivity to single-phase ground faults,with particular proficiency in detecting metallic single-phase earth faults.The combined use of this sensor and current distribution automation terminals allows for the accurate location of metallic single-phase earth faults.The evalu-ation of this sensor′s application provides insights that contribute to the advancement of single-phase earth fault handling techniques in distribution networks.
distribution networksensortransient zero-sequence currentfault indicatorfault location
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